.science-page {
    display: grid;
    gap: 1.5rem;
}

.science-hero,
.science-controls,
.science-results {
    background: rgba(15, 23, 42, 0.76);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 18px;
    box-shadow: 0 20px 48px rgba(2, 6, 23, 0.24);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.science-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.7fr) minmax(280px, 1fr);
    gap: 1.5rem;
    align-items: end;
    padding: 2rem;
}

.eyebrow {
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.science-title {
    text-align: left;
    margin-bottom: 1rem;
}

.science-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
}

.science-stat {
    display: grid;
    gap: 0.375rem;
    padding: 1rem;
    border-radius: 14px;
    background: rgba(30, 41, 59, 0.74);
    border: 1px solid rgba(148, 163, 184, 0.18);
}

.science-stat strong {
    font-size: 1.5rem;
}

.science-stat span {
    color: var(--text-light);
    font-size: 0.875rem;
}

.science-controls {
    display: grid;
    gap: 1rem;
    padding: 1.5rem;
}

.science-search {
    display: flex;
    gap: 0.75rem;
}

.science-search-input {
    flex: 1;
    min-height: 48px;
    padding: 0 1rem;
    font-size: 1rem;
    color: var(--text-dark);
    border: 1px solid rgba(148, 163, 184, 0.24);
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.68);
    outline: none;
    transition: var(--transition);
}

.science-search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.18);
}

.science-search-btn {
    min-width: 120px;
    border-radius: 12px;
}

.science-filter-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.science-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.science-select-row {
    display: grid;
    grid-template-columns: minmax(130px, 0.8fr) minmax(180px, 1.25fr) minmax(130px, 0.8fr) auto;
    gap: 0.75rem;
    align-items: end;
}

.science-select-field {
    display: grid;
    gap: 0.35rem;
    min-width: 0;
}

.science-select-field span {
    color: var(--text-light);
    font-size: 0.82rem;
    font-weight: 700;
}

.science-select,
.science-reset-btn {
    min-height: 42px;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.24);
    background: rgba(15, 23, 42, 0.68);
    color: var(--text-dark);
    font-weight: 700;
}

.science-select {
    width: 100%;
    padding: 0 0.85rem;
    outline: none;
}

.science-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.18);
}

.science-reset-btn {
    padding: 0 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.science-reset-btn:hover {
    border-color: rgba(96, 165, 250, 0.42);
    background: rgba(37, 99, 235, 0.22);
}

.science-filter,
.science-toggle,
.science-learned-btn,
.science-icon-btn {
    min-height: 38px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.24);
    background: rgba(30, 41, 59, 0.66);
    color: var(--text-dark);
    padding: 0 0.95rem;
    cursor: pointer;
    font-weight: 700;
    transition: var(--transition);
}

.science-filter.active,
.science-toggle.active,
.science-learned-btn.is-active,
.science-icon-btn.is-active {
    border-color: rgba(96, 165, 250, 0.42);
    background: rgba(37, 99, 235, 0.28);
    color: #f8fafc;
    box-shadow: 0 0 0 1px rgba(125, 211, 252, 0.22), 0 0 18px rgba(56, 189, 248, 0.14);
}

.science-results {
    padding: 1.5rem;
}

.science-results-header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.science-meta {
    margin-top: 0.4rem;
    color: var(--text-light);
}

.learning-progress {
    min-width: 180px;
    display: grid;
    gap: 0.5rem;
    color: var(--text-light);
    font-weight: 700;
}

.learning-progress-track {
    height: 8px;
    border-radius: 999px;
    background: rgba(30, 41, 59, 0.9);
    overflow: hidden;
}

.learning-progress-fill {
    height: 100%;
    width: 0;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width 0.25s ease;
}

.science-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.science-card {
    overflow: hidden;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(15, 23, 42, 0.72);
    box-shadow: 0 16px 36px rgba(2, 6, 23, 0.2);
    transition: var(--transition);
}

.science-card:hover {
    transform: translateY(-6px);
    border-color: rgba(96, 165, 250, 0.38);
}

.science-cover {
    min-height: 220px;
    position: relative;
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    padding: 1rem;
    overflow: hidden;
    background-color: #0f172a;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.science-cover::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(15, 23, 42, 0.04), rgba(15, 23, 42, 0.82)),
        linear-gradient(90deg, rgba(15, 23, 42, 0.42), rgba(15, 23, 42, 0.04) 50%, rgba(15, 23, 42, 0.46));
}

.science-cover > * {
    position: relative;
    z-index: 1;
}

.science-cover > span,
.keyword-list span {
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    background: rgba(96, 165, 250, 0.14);
    color: var(--primary-color);
    border: 1px solid rgba(96, 165, 250, 0.18);
    font-size: 0.875rem;
    font-weight: 700;
}

.science-icon-btn {
    margin-left: auto;
    background: rgba(15, 23, 42, 0.38);
    border-color: rgba(255, 255, 255, 0.24);
}

.play-btn {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 64px;
    height: 64px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.28);
    box-shadow: 0 18px 40px rgba(2, 6, 23, 0.26);
    cursor: pointer;
}

.science-info {
    display: grid;
    gap: 0.85rem;
    padding: 1.25rem;
}

.science-kicker {
    color: var(--text-light);
    font-size: 0.875rem;
}

.science-card-title {
    margin: 0;
    color: var(--white);
    font-size: 1.22rem;
    line-height: 1.4;
}

.science-desc {
    color: var(--text-light);
    line-height: 1.75;
}

.keyword-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.science-card-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(120px, auto) auto;
    gap: 0.75rem;
    align-items: center;
}

.science-detail-btn {
    border-radius: 12px;
    text-align: center;
}

.science-watch-btn {
    border-radius: 12px;
    text-align: center;
    white-space: nowrap;
}

.science-card mark {
    padding: 0 0.15em;
    border-radius: 0.25rem;
    background: rgba(250, 204, 21, 0.28);
    color: #fde68a;
}

.science-empty {
    margin-top: 0.5rem;
    padding: 1.25rem;
    border-radius: 12px;
    background: rgba(30, 41, 59, 0.62);
    border: 1px dashed rgba(148, 163, 184, 0.22);
    color: var(--text-light);
}

.science-dialog-panel {
    position: fixed;
    inset: 0;
    z-index: 30;
    display: grid;
    place-items: center;
    padding: 1rem;
    background: rgba(2, 6, 23, 0.74);
}

.science-dialog-panel[hidden] {
    display: none;
}

.science-dialog {
    position: relative;
    width: min(940px, 100%);
    max-height: min(780px, 88vh);
    overflow: auto;
    border-radius: 18px;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.24);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.36);
}

.science-dialog-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 1;
    min-height: 38px;
    padding: 0 0.95rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    background: rgba(15, 23, 42, 0.72);
    color: #fff;
    cursor: pointer;
}

.science-dialog-cover {
    min-height: 280px;
    display: flex;
    align-items: flex-end;
    padding: 1.5rem;
    color: #fff;
    background-color: #0f172a;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.science-dialog-cover span {
    display: inline-flex;
    width: fit-content;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.58);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 0.75rem;
}

.science-dialog-cover h3 {
    margin: 0 0 0.5rem;
    font-size: 1.7rem;
}

.science-dialog-cover p,
.dialog-summary,
.science-outline li,
.science-question p {
    color: rgba(226, 232, 240, 0.92);
    line-height: 1.8;
}

.science-dialog-body {
    display: grid;
    gap: 1.15rem;
    padding: 1.5rem;
}

.dialog-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.external-source-note {
    padding: 0.75rem 0.9rem;
    border-radius: 12px;
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(96, 165, 250, 0.18);
    color: rgba(226, 232, 240, 0.88);
    line-height: 1.7;
}

.science-dialog-body h4 {
    margin-bottom: 0.65rem;
    color: var(--white);
}

.science-outline {
    padding-left: 1.25rem;
}

.science-question {
    padding: 1rem;
    border-radius: 12px;
    background: rgba(30, 41, 59, 0.66);
    border-left: 4px solid var(--accent-color);
}

.science-question summary {
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 700;
    margin-top: 0.75rem;
}

@media (max-width: 900px) {
    .science-hero,
    .science-grid,
    .science-select-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .science-search,
    .science-filter-row,
    .science-results-header {
        flex-direction: column;
    }

    .science-search-btn,
    .science-toggle,
    .science-reset-btn,
    .learning-progress {
        width: 100%;
    }

    .science-stats {
        grid-template-columns: 1fr;
    }

    .science-cover {
        min-height: 190px;
    }

    .science-info {
        padding: 1rem;
    }

    .science-card-actions {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 0.625rem;
    }

    .science-detail-btn {
        grid-column: 1 / -1;
    }

    .science-watch-btn,
    .science-learned-btn {
        width: 100%;
        min-height: 42px;
        padding: 0 0.5rem;
        border-radius: 12px;
        font-size: 0.92rem;
    }

    .science-cover > span,
    .science-icon-btn {
        font-size: 0.82rem;
        padding-inline: 0.72rem;
    }
}